Abstract: A pump device is for sucking and transferring objects. The pump device includes a pump housing, at least one impeller, an air withdrawal opening, at least one inlet opening defined in the pump housing, at least one outlet opening defined in the pump housing, and at least one chive device connected to the pump device. The pump housing includes a first short side defined as a semicircle or a partial circle and a second short side defined as a flat or plane surface, two long sides having a tapered shape extending from the first short side to the second short side, and two planar sides so as to define a closed pump housing. The at least one impeller is in the pump housing.

Abstract: The present invention relates to a pump device for sucking and transferring articles, wherein the pump device comprises a pump housing, an air withdrawal opening, at least one inlet opening and an outlet opening formed in the pump housing, at least one drive device being connected to the pumping device, the pump housing further comprising a first short side formed as a semicircle or a partial circle and a second short side formed as a flat or plane surface, two long sides extending tapered from the first short side to the second short side and two planar sides, forming a closed pump housing, where at least one impeller further is arranged in the pump housing.

Abstract: Method for controlling one or more vacuum generators (1) and thereby the vacuum in a vacuum sewage system, in particular controlling one or more liquid ring screw pumps in such system, including beyond the generator/s (1) one or more tubular collectors or suction pipelines (2) connected to the vacuum generator and one or more toilets, urinals, grey water sinks etc (3, 4), connected to the suction pipeline through branch pipelines (6). The rotational speed of the vacuum generator (1) is controlled on the basis of the set vacuum requirement.

Abstract: Screw type liquid ring pump (1) with an integrated grinder or macerator (2), including a pump housing (3) with an inlet (5) and an outlet (7) and an, inside the housing, rotating helical screw rotor (4), which rotor at one end, the inlet end of the pump housing is provided with the grinder (11) and at the other end, the outlet end of the pump housing is communicating with a pressure chamber (6). The screw rotor is provided on a shaft (18) connected (not shown) to a driving unit in the form of a motor, preferably an electric motor. The grinder includes a rotary cutter (12) attached to the inlet end of the helical screw (4) shaft and a stationary cutter (13) attached to a grinder housing part (15), each cutter being provided with cutting tools or knives, whereby the rotary cutter (12) is freely rotating within the stationary cutter (13) when the pump is running.

Abstract: Screw type liquid ring pump (1) with an integrated grinder or macerator (2), including a pump housing (3) with an inlet (5) and an outlet (7) and an, inside the housing, rotating helical screw rotor (4), which rotor at one end, the inlet end of the pump housing is provided with the grinder (11) and at the other end, the outlet end of the pump housing is communicating with a pressure chamber (6). The screw rotor is provided on a shaft (18) connected (not shown) to a driving unit in the form of a motor, preferably an electric motor. The grinder includes a rotary cutter (12) attached to the inlet end of the helical screw (4) shaft and a stationary cutter (13) attached to a grinder housing part (15), each cutter being provided with cutting tools or knives, whereby the rotary cutter (12) is freely rotating within the stationary cutter (13) when the pump is running.

Abstract: Method for controlling one or more vacuum generators (1) and thereby the vacuum in a vacuum sewage system, in particular controlling one or more liquid ring screw pumps in such system, including beyond the generator/s (1) one or more tubular collectors or suction pipelines (2) connected to the vacuum generator and one or more toilets, urinals, grey water sinks etc (3, 4), connected to the suction pipeline through branch pipelines (6). The rotational speed of the vacuum generator (1) is controlled on the basis of the set vacuum requirement.